Who's calling me a lightweight???!!!

just kidding

NoUgly... The Mt Whitney trail is sure a tough place to make your first backpack trip! There is SO much elevation gain, and the high altitude can hit you like a punch to the gut. (...or head, or both!)
Taking a practice trip would be a good idea.
And learning about AMS (Altitude Sickness) is highly important. Be aware that carrying a heavy load and climbing can double the effects of the altitude.